Originally Posted by
AC103
Do you have the guidance reference for that one djpil?
My time was some time back so prior to that AC. It mentions Vcmin and Vcmax but there is nothing in FAR 23 about a Vcmax. I can give plenty of examples of types with Vc outside the range given as gospel by that AC - of course, like me they predate that AC.
It goes on to state “with the following understanding” that Vc is less than or equal to 0.9Vh. Again, I don't see that the words in FAR are consistent with that. But who am I to argue with the FAA and their current AC. I am unable to find the first issue of that AC online. The predecessor to that AC is AC 23-3 of 1985 and there is nought in there about Vc.
Interesting that the text of CAR 3 is different: “And further provided, That the required minimum value need be no greater than 0.9 Vh actually obtained at sea level.” Quite clear to me.